I'm totally confused on what I need to buy - seem to remember some rule about 1.5 or 2 times the width?
The space the curtains will cover is about 2.5 metres wide and the curtains come in 135cm width. So do I buy 2 or 4? 4 sounds right as it means there will be more material & they'll hang nicely/give more insulation. I know I should phone up & ask (it's a catalogue) but don't want to sound a dimwit about something that may be obvious to everyone but me.
Thank you!